yeah a GSR an LS R/S ratio is about the same, but if you add a deck plate you can pick up a few more frome the GSR than the LS, im actuall thinking of switching from a B16a1, to a GSR, but it takes time, so get a block here, a head there, you know how it goes. i really looked into the LS/Vetec thing for about 6months, but its just easier and more stable to build a GSR or LS turbo, i havent seen a LS/vetec to date that is boosted or running a shot. last more than a year. but i have seen some FULLY built LS/V-tec's put down some good numbers too.